Jack.



P. J. MALONEY.

JACK.

APPLICATION FILED MAY 23, 1913.

PETER J. MALONEY, OF WORCESTER, MASSACHUSETTS.

JACK.

Specification of Letters Patent.

Patented Feb. 17, 1914.

Application filed May 23, 1913. Serial No. 769,355.

To all whom it may concern Be it known that I, PETER J. MALONEY, a citizen of the United States, residing at Vorcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Jack, of which the following is a specification.

This invention relates to a jack designed especially for use on flooring, but capable of use for other similar purposes, such as taking down sidings andthe like.

The principal objects of the invention are to provide a. device of this character in which a great leverage can be secured by the use of only three parts and those each of a very simple character and adapted to be made inexpensively; and especially to provide a construction in which a pair of wedges can be driven under the back of a board and a lever operated in a convenient manner for loosening the board so that when one end of the board is loosened the device can be slid along very easily to a new position and operated again; and to provide the lever in a convenient position for use in handling the device as well as operating it.

Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which,

Figure 1 is a front elevation of a jack constructed in accordance with this invention; Fig. 2 is a plan; and Fig. 3 is a sectional view on the line 33 of Fig. 2.

The invention is shown as comprising three members A, B and C. The member A is in the form of a bar 10 having an upward projection 11 at one end provided with a flat wedge 12 projecting to the rear. In the use of the device for ripping up flooring, this wedge would be arranged in horizontal position. At the front is a boss 13 in which is placed a hard metal plug 1% for receiving the blows of a hammer when it is necessary to drive the wedge in under the board. This member A is also provided with a projection 16 on the front parallel with the main bar 10 and these parts constitute a support for a stud or pin 17. On this stud or pin is pivotally mounted the member C which is provided with an operating handle 20 and a segmental gear or pinion 21. The intermediate member 13 comprises a curved rack 30 meshing with the gear or pinion and a bar 31 pivoted by a pivot 32 to the outer end of the bar 10 and provided with a wedge 33 located similarly to the other wedge but at the opposite end of the device. Back of this wedge is a boss an having a hard metal plug for the same purpose, as the plug 14:. The pin 17 serves as a stop for the free end of the bar or lever 31. The space between the bar 10 and the part 16 serves, as will be obvious, for the purpose of receiving both the gear and the rack and guiding the latter.

The use of the device will be obvious. It is handled, preferably, by holding the end of the handle in the right hand and the other end of the bar 10 in the left hand. The wedges are put in under the board and driven in if necessary. The parts being in that position, the only thing required for operation is to force the handle down, thus moving the lever 31 up at the left. From the position of the parts it will be seen that a compound leverage is secured which gives great purchase on the board and results in separating it with the expenditure of very little force. Then without removing the right hand from the handle, the device can be moved along to the right if desired, and the leverage applied again. In this way it will be seen that a very effective instrument for this and all similar purposes is provided consisting of a small number of parts each of a simple construction and capable of being handled and manipulated in a very simple way.

Although I have illustrated and described only a single embodiment of the invention, I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited in these respects, but

\Vhat I do claim is 1. In a jack, the combination of a bar having a wedge projecting therefrom at one end, a lever pivoted to the other-end of said bar and having a wedge projecting therefrom at that end substantially in alinement with the first named wedge, and means sup ported by the bar for swinging said lever about its pivot.

2. In a jack, the combination of a bar having a wedge projecting therefrom transversely at one end, a lever pivoted to the other end of said bar and having a wedge projecting therefrom at that end substantially in alineinent with the first named vedge, and means back of the first named wedge for swinging said lever about its pivot.

3. In a jack, the combination of a bar having a wedge projecting therefrom at one end, a lever pivoted to the other end of said bar and having a wedge projecting therefrom at that end parallel with the first named wedge, means supported by the bar back of the first named wedge for swinging said lever about its pivot, said bar and lever respectively being provided with hard metal plugs at the rear of the wedges for receiving the blows of a hammer in driving the wedges in.

4:. In a jack, the combination of a bar having a wedge projecting therefrom at one end, a lever pivoted to the other end of said bar and having a wedge projecting therefrom at that end parallel with the first named wedge, a'rack on the end of said lever and a handle pivoted on the bar and having a gear or pinion meshing with the rack.

5. In a device of the character described, the combination of a bar having a wedge at one end. thereof and provided with a recess in front of said wedge, a lever pivoted at the other end of said bar and having a wedge at that end and provided with a vertical rack arranged in said recess a gear pivoted in said recess and meshing with said rack, and an integral handle on the gear for operating it.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

PETER J. MALONEY. \Vitnesses ALBERT E. FAY, C. FORREST lVEssoN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G." 

